package controllers

import (
	"context"

	"git.golem15.com/golem15/summercms/modules/cabana"
	"git.golem15.com/jakub/sm-bm-plugin/models"
)

// Permission codes of the plugin's admin screens.
const (
	PermCourses   = "jz.bm.access_courses"
	PermSchedule  = "jz.bm.access_schedule"
	PermMaterials = "jz.bm.access_materials"
)

// temporalHooks checks the order of a model's dates before every admin save
// and answers a bad value as a 422 on its field. lagoon.Validate cannot
// compare two fields, so the model checks them itself
// (models.TemporalValidator).
type temporalHooks struct{}

func (temporalHooks) FormBeforeCreate(_ context.Context, model any) error {
	return checkTemporal(model)
}

func (temporalHooks) FormBeforeUpdate(_ context.Context, model any) error {
	return checkTemporal(model)
}

func checkTemporal(model any) error {
	v, ok := model.(models.TemporalValidator)
	if !ok {
		return nil
	}
	msgs := v.TemporalErrors()
	if len(msgs) == 0 {
		return nil
	}
	details := make(map[string]any, len(msgs))
	for field, m := range msgs {
		details[field] = m
	}
	return &cabana.ValidationError{Details: details}
}

// courseRelation is the belongsTo picker of a course_id column.
func courseRelation(foreignKey string) cabana.FieldRelationContract {
	return cabana.FieldRelationContract{
		Field:       "course",
		Kind:        "belongsTo",
		NewRelated:  func() any { return &models.Course{} },
		ForeignKey:  foreignKey,
		LabelColumn: "name",
	}
}